| article html file updated | 29 August 2025 23:08 CEST | Update | https://www.mdpi.com/2221-3759/4/2/19 |
| article html file updated | 20 August 2025 22:20 CEST | Update | - |
| article html file updated | 7 February 2020 09:17 CET | Update | - |
| article html file updated | 5 May 2019 14:41 CEST | Update | - |
| article html file updated | 27 March 2019 05:45 CET | Update | - |
| article html file updated | 1 July 2016 11:46 CEST | Update | - |
| article html file updated | 25 May 2016 15:54 CEST | Original file | - |
| article xml uploaded. | 25 May 2016 15:53 CEST | Original file | https://www.mdpi.com/2221-3759/4/2/19/xml |
| article pdf uploaded. | 25 May 2016 15:53 CEST | Version of Record | https://www.mdpi.com/2221-3759/4/2/19/pdf |
